Pentax Auto 110 Pentax K-mount (adapter variant with aperture ring for DA lenses available) PL mount Rollei-mount Sigma SA-mount (Sigma MC-11 SA-E with AF and electronic aperture control) T2-mount (screw) List of Sony E-mount adapters with a focal reducer A focal reducer is a device which inserts between main lens and camera and shrinks image circle while simultaneously increasing the f-stop of the lens. The downside is that only lenses from other systems with longer flange distance are accepted. Native E-mount lenses are not supported. Metabones Speed Booster, from full-frame SLR to APS-C, 0.71x Metabones Speed Booster Ultra, from full-frame SLR to APS-C, 0.71x Zhongyi Lens Turbo, from full-from frame SLR to APS-C, 0.71x Kipon Baveyes Ultra 0.7x Adapter, from Medium Format SLR to Sony-E full-frame (announced 2016) Kipon Baveyes L/M-S/E 0.65x, from Leica M-mount to Sony APS-C (announced 2016) Comparison with similar lens mounts See also List of Sony E-mount cameras List of Sony E-mount lenses List of third-party E-mount lenses References Lens mounts Camera lenses introduced in 2010 Japanese inventions